Finding the Fourth Proportional to 21,621.78, 29,822.31 and 16,528.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,621.78 : 29,822.31 = 16,528.82 : x
2. Step 2: Convert to fraction form
   21,621.78/29,822.31 = 16,528.82/x
3. Step 3: Cross multiply
   21,621.78x = 29,822.31 × 16,528.82
4. Step 4: Simplify right side
   21,621.78x = 492,927,444.86
5. Step 5: Solve for x
   x = 492,927,444.86/21,621.78
6. Step 6: Final answer
   x = 22,797.73